Patent US4834619A successfully refreshed from Google Patents.
Patent US3960775A successfully refreshed from Google Patents.
US3960775A
Expired / Lapsed
US
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Catalyst for the production of ethylene oxide
Assignee: SnamProgetti SpA
•
Filing: 1973-08-01
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Granted: 1976-06-01
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Expires: 1993-08-01
Abstract
Abstract The present invention provides a novel catalyst for use in the manufacture of ethylene oxide from ethylene. The catalyst comprises silver, calcium and barium in gram atomic ratio of 15/2.5/1.
Inventors
- 👤 Carlo Piccinini
- 👤 Morello Morelli
- 👤 Pierluigi Rebora
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:12
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/66
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
24 words
A catalyst for the oxidation of ethylene to ethylene oxide, said catalyst comprising silver, calcium and barium in a gram atomic ratio of 15/2.5/1.
Claim 2
Dependent Claim
24 words
A catalyst for the oxidation of ethylene to ethylene oxide, said catalyst comprising silver, calcium and barium in a gram atomic ratio of 15/2.5/1.
Claim 3
Dependent Claim
12 words
The catalyst of claim 1 wherein said catalyst includes a ceramic carrier.
Claim 4
Dependent Claim
11 words
The catalyst of claim 2 wherein said ceramic carrier is alumina.
Claim 5
Dependent Claim
15 words
The catalyst of claim 3 wherein the alumina has a volume porosity of about 50%.
Claim 6
Dependent Claim
16 words
The catalyst of claim 4 wherein the pores have radii ranging between 100 and 700 microns.
Claim 7
Dependent Claim
15 words
The catalyst of claim 1 wherein the carbonates of silver, calcium and barium are employed.
References Cited (Backward Citations)
US3332887A
Cited
US3725307A
Cited
US3773693A
Cited
US3775346A
Cited
US3664970A
Cited
US3793231A
Cited
US3781224A
Cited
US3794588A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |